Glass coffee maker



Sept. 8, 1936. UMSTQTTI 2,053,451

GLASS COFFEE MAKER Filed Sept. 23, 1955 INVENTOR Haro/oFUmsloff.

ATTbRNEY WITNESSES= Batented Sept. 8, I936 I UNITED STATES PATENT cariesWestinghouse Electric 8; Manufacturing Company, East Pittsburgh, Pa., acorporation 9f Pennsylvania Application September 23, 1933,

4 Claims.

My invention relates to devices for making infusions and particularly toglass coffee makers. An object of my invention is to provide a coifeemaker embodying relatively few non-metallic parts that may be easily andquickly assembled for use and as easily and quickly disassembled.

Another object of my invention is to provide a coffee maker of the typein which the hot water comes in contact with the ground coffee for a mlimited time only, in which the water or the infusion shall not touchany other than a glass surface, or the like.

Another object of my invention is to. provide a glass coifee maker.assembly that shall use a single resilient member to hold all or theparts in proper operative positions relatively to each other.

Other objects will either be apparent from the description of apreferred form of device embodying my invention or will be pointed outhereinaiter. v a

In practicing my invention, I provide an open top lower bowl, an opentop and bottom upper bowl and a funnel having a flared upper end, as

well as a single resilient member for holding all of the parts in properoperativepositions relatively to each other.

The single figure of the accompanying drawing is a view mainly invertical section through a preferred form of device embodying my'invention. a

times called Silex and the parts thereof with which the water comes incontact are preferably, although not necessarily, made of glass.

vice which is non-metallic and which may be engaged by the water maycause a contamination of the infusion and, hence the design andconstruction of my improved coffee maker is such a 40 as to avoid sucheflect.

A lower bowl of glass, or the like, II is provided with an upper endportion l2 of reduced diameter and whlch'has apouring lip l3 and, whichis further'adapted to contain the initially cold water indicated byreference character it in'the drawing, the liquid level being indicatedby reference character ii.

A handle I9 is provided for the lower bowl ll and is so designed andconstructed as to have a clamping portion or annulus 2|, which maycomprise two parts pivoted to each other and which surrounds the upperneck of the bowl ll, heatinsulating material 23 being provided betweenthe clamping toreduce the tempera riseof'thehandie My improved coffeemakerds of the type some- Any part or element of such a coflee-making dearound the outside of part 29 of the upper bowl.

link 2i angui he glass bowl in order.

Serial No. 690,679 (01. 53-3) proper. While I haveiilustrated anddescribed a specific embodiment of a handle and a handle clampingstructure, I do not desire to bellmited thereto as this detail does notconstitute any part of my invention. v

An upper bowl 25 of glass, or the like, is provided with an intermediateportion of enlarged diameter while the upper end portion 2'! is oireduced diameter and the lower end portion 29 is also of reduceddiameter to properly flt within 10 the upper end portion of lower bowlH. It is to be understood that a cover member not shown in the drawingmay be located onthe upper end portion 21, but this is not shown as itforms no part of my present invention.

A funnel 3| of glass, or the like, having afiared upper end portion 33is located substantially as shown in the drawing with its flared upperend 33 resting upon the lower part of the intermediate portion ofbowl25, just above the lower end por- 20 tion 29, and a filter cloth 35 islocated substantially as shown around the flared upper end 33 of thefunnel. This may be done by providing a fllter cloth of sack shapehaving a draw string 31 at its open end by means of which the fllter g5cloth is stretched round the flared end of the funnel substantially asshownin the drawing. The fllter cloth thus provides a substantiallyfluid tight gasket between the flared upper end of the funnel and thebowl 25.

A single resilient member here shown as a perforated. rubber member-orgasket 39 ofsubstantially preferably cup shape flts tightly within theupper end portion I2 of the lower bowl II and holds all of the parts inproper operative positions 35 relatively to each other. The outersurface of the lower part 29 of the upper bowl is preferably slightlyroughened, as by being sand blasted. and the annular portion 4| ofmember 39 fits tightly The opening 33 in the base or flat axial part ofmember 39 is of such dimension as to tightly fit around the body portionof funnel 3| when the funnel is in substantially the position shown in'the drawing.

To assemble the structure whenever the same has been disassembled inorder-to remove coffee grounds 35 from the upper bowl, the funnel 3i,together with the flltercloth 35 located across the upper open end ofthe funnel, are placed in the upper bowl 25 in substantially theposition shown. the resilient cup shaped member 33 being preferablyinitially placed around the lower end 23 of the upper bowl 25. In orderthat the funnel may be held tightly in its proper operative posi- 55 ofthe funnel and push upwardly, that is, in a direction toward the bowl 2!on the intermediate pagt of member 39, whereby such intermediate partand particularly the walls of opening 43 will tightly grip the body ofthe funnel to make a water tight joint and will at the same time tend topull the funnel downwardly so as to make the desired water tight jointwith lower end of the bowl, 25.

The bowl 25, funnel SI and resilient member 3! may now be located intheir proper operative po sitions within the upper endof bowl II, itbeing only necessaryto press downwardly on the bowl 25f with-suiflcientpressure to ensure the desired steam tight Joint therebetween.

When a coflee maker of this type is placed upon a suitable heater whichmay be either an electric heating element or a gas flame, the water I!will be heated, and steam will be generated above the fluid level II,which will result flnally in the generation of suiflcient steam pressureto force substantially all of the water in bowl H upwardly through thefunnel Si and into engagement with and through the coffee grounds 4!.The amount of water forced upwardly is, of course, determined by theposition of the lower end of funnel Upon removing the coflee maker fromthe source of heat, the steam in the lower bowl II will condense and'theinfusion until then located in the upper bowl 25 and held there by thesteam pressure in bowl II will return to the lower bowl. After thisaction, the upper bowl, the funnel and the resilient member 39 mayberemoved from thickness of the filter cloth around the outside ofthe-flared end 33, the Joint between the funnel and the upper bowl 2}should not be fluid tight, and water should enter the space within thelower end portion 28 and the closed resilient member 3!, such fluidwould be unable to find its way downwardly along the body of the funnel3|, so

v therefore, that only such limitations shall be that any water whichmight have come into' contact with a rubber gasket will not be mixedwith.

This ac-' sample which I have made and tested.

Various modifications may be made in the device embodying my inventionwithout departing from the spirit and scope thereof, and I desire,

placed thereon as are imposed by the prior art or are set forth in theappended claims.

I claim as my invention:

1. A glass coflee maker comprising an open top lower glass bowl, an opentop and bottom upper glass bowl interfltting with the lower bowl, aglass funnel having a flared upper end located in the upper bowl, 9.filter cloth surrounding the flared upper end of the funnel, and asingle resilient member of cup-shape holding the upper bowl, the lowerbowl and the funnel in proper operative positions relatively to eachother, the

annular portion of said member acting as a comprwsion gasket betweenthetwo bowls.

2. A glass coffee maker comprising an open top lower glass bowl, an opentop and bottom upper glass bowl interfltting with the lower bowl, aglass funnel having a. flared upper end located in the upper bowl, afllter cloth surrounding the flared upper end of the funnel, and asingleresilient member holding the upper bowl, the lower bowl and the funnelin proper operative positions relatively to each other, said memberhaving an annular portion acting as a compression gasket between the twobowls, and having also a flange portion engaging the funnel to force itin a directlon to hold the flared upper end of the funnel against theupper bowl. 1

' 3. A, glass coffee maker including an open top lowerbowl, an open topand bottom upper bowl having a lower end portion of reduced diameter toflt within the open top of the lower bowl, a. funnel having a flaringtopfltting within the upper bowl and extending downwardly therethroughand into the lower. bowl, and a resilient gasket, of perforated cupshape, having its annular portion located between the interfltting upperand lower bowls and its perforated base portion surrounding and grippingthe stem of the funnel. 1

4. A glass coflee maker including a lower open top bowl-for receivingthe infusion, an upper bowl having an open bottom portion of reduceddiameter located in the upper end of the lower bowl, a funnel having aflared upper end resting on the reduced diameter portion of the upperbowl and extending downwardly therethrough and into the lower bowl, afilter cloth covering the flared upper end of the funnel and extendingtherearound into engagement with the inner surface of the bottomportionof reduced diameter of the.

upper bowl and a resilient member, of centrallyperforated cup-shape,having an annular portion located between the interiltting upper andlower bowls to provide a tight joint therebetween and itsperforatedcentral portion closely surrounding and gripping the stem of the funnelto prevent water flowing downwardly past the filter cloth and contactingthe resilient member from entering the lower bowl. r

